Structure, electromagnetic and dielectric properties of Ti-substituted lithium--zinc ferrite

Guo, Yuheng; Zhu, Jianguo; Li, Haiyan

doi:10.1007/s10854-021-05419-2

Cited by 9 publications

(2 citation statements)

References 36 publications

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“…This is due to the applied thermal energy, which enhances the space charge polarization. This increase in space charge polarization broadens the relaxation frequency . The loss tangent values of the nanocomposite films were significantly less than those of the pure PVDF–HFP film (Figure e).…”

Section: Resultsmentioning

confidence: 99%

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Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor

Panda,

Pasha

2023

Langmuir

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A simple solution casting technique was used to fabricate perovskite strontium titanate (SrTiO3)-loaded poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF–HFP) nanocomposite films for efficient energy storage applications. Various microscopic and spectroscopic methods were used to study the characteristics of the polymer nanocomposite films, like Fourier transform infrared spectroscopy (FTIR), X-ray diffraction technique (XRD), field emission scanning electron microscopy (FESEM), ultraviolet–visible spectroscopy, thermogravimetric analysis, and mechanical tensile test (stress vs strain). The FTIR, XRD, and FESEM analyses confirmed the incorporation and proper dispersion of SrTiO3 nanoparticles in the PVDF–HFP polymer matrix. An improvement in the optical, thermal, and mechanical behavior of the nanocomposite film was observed compared to the pure polymer. The values of dielectric constant, loss tangent, and AC conductivity of pure PVDF–HFP polymer and PVDF–HFP/SrTiO3 nanocomposites (2, 6, and 10 wt % SrTiO3 loadings) were analyzed in a temperature and frequency span of 30–150 °C and 1–100 kHz, respectively. To better understand the electrical properties of the materials, Nyquist plots were generated, and their related circuit designs were fitted. The 2 wt % SrTiO3 loaded nanocomposite exhibited the highest dielectric enhancement and AC conductivity compared to higher filler-loaded nanocomposites. This exceptional dielectric enhancement at very small filler loading is beneficial for commercialization and economically viable for real-time applications.

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Section: Resultsmentioning

confidence: 99%

“…This increase in space charge polarization broadens the relaxation frequency. 49 The loss tangent values of the nanocomposite films were significantly less than those of the pure PVDF−HFP film (Figure 11e). The resonance peaks were moved to a higher frequency by the increased filler loading.…”

Section: ■ Introductionmentioning

confidence: 98%

Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor

Panda,

Pasha

2023

Langmuir

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Impact of ZrO2 additive on the microstructure, magnetic properties, and temperature dependence of the initial permeability of LiTiZn ferrite ceramics

Малышев

Petrova

Суржиков

2021

J Mater Sci: Mater Electron

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The effect of the diamagnetic ZrO2 addition on the microstructure and magnetic properties of LiTiZn ferrite ceramics, including the shape and parameters of the temperature dependence of the initial permeability, has been investigated. The defect structure of ferrite ceramic samples is assessed according to our earlier proposed method based on mathematical treatment of the experimental temperature dependencies of the initial permeability. The method is recommended for defects monitoring of soft ferrite ceramics and ferrite products. It was found that the defect structure of ferrite ceramics increased by 350% with an increase in the concentration of the ZrO2 additive in the range of (0-0.5) wt.%. In this case, for the same samples, the increase in the true physical broadening of reflections is only 20%, and the coercive force by 50%. Simultaneously, the maximum of the experimental temperature dependence of the initial permeability dropped by 45%.The microstructure of all samples is characterized with a similar average grain size according to the SEM data. However, samples with the 0.5wt.% of ZrO2 are characterized by the formation of conglomerates. A linear relationship was obtained between the defect structure and the width of the reflections, which indicates that this parameter is related to the elastic stress of ferrite ceramics.

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Lithium dopant assisted surface modification Zn ferrites for high-performance supercapacitor applications

Mahmoud

Elshahawy

Taha

2023

Journal of Energy Storage

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Structure, electromagnetic and dielectric properties of Ti-substituted lithium--zinc ferrite

Cited by 9 publications

References 36 publications

Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor

Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor

Impact of ZrO2 additive on the microstructure, magnetic properties, and temperature dependence of the initial permeability of LiTiZn ferrite ceramics

Lithium dopant assisted surface modification Zn ferrites for high-performance supercapacitor applications

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Structure, electromagnetic and dielectric properties of Ti-substituted lithium--zinc ferrite

Cited by 9 publications

References 36 publications

Amplified Dielectric Properties of PVDF–HFP/SrTiO3 Nanocomposites for a Flexible Film Capacitor

Amplified Dielectric Properties of PVDF–HFP/SrTiO3 Nanocomposites for a Flexible Film Capacitor

Impact of ZrO2 additive on the microstructure, magnetic properties, and temperature dependence of the initial permeability of LiTiZn ferrite ceramics

Lithium dopant assisted surface modification Zn ferrites for high-performance supercapacitor applications

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Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor

Amplified Dielectric Properties of PVDF–HFP/SrTiO₃ Nanocomposites for a Flexible Film Capacitor